<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 选择多组标签,之间用,隔开 */
        div,p,span {
            color: red;
        }
    </style>
</head>
<body>
    <div>这是div标签</div>
    <p>这是p标签</p>
    <span>这是span标签</span>
</body>
</html>